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. Author manuscript; available in PMC: 2013 Apr 11.
Published in final edited form as: J Am Chem Soc. 2012 Mar 29;134(14):6286–6295. doi: 10.1021/ja2118392

Figure 1.

Figure 1

Stereochemical models for the aldol reaction of cyclohexanone and benzaldehyde catalysed by (A) (S)-proline, (B) (S)-alanine, and (C) (S)-tryptophan. (D) Stereochemical model for the Hajos–Parrish reaction.